EGT 116 Final Exam

Which is NOT one of the six most popular welding processes.

ACCS

What class of electrodes is the most utilitarian for welding fabrication?

F3/6010

Aluminum Shrinks are the following allowance ____ in per foot

.125-.156

What pressure should the Oxygen hose be set to when welding?

10-20

What amperage should you set the welder to for electrodes starting with 60

110-120 amps

Isometric drawings are drawn at ___o angle so it appears you are looking at one corner.

30*

Spatter, slag, fumes, and the stub are all reasons approximately _________% of every SMA welding electrode wasted?

35%

What pressure should the Acetylene be set to when welding?

5-7

A piece of frame material is 50' long. If we cut it into 6. 25" long pieces, how many pieces will we have?

96

Which comes first in the casting operation A or B A Place the pattern in the Drag B Make the funnel

A

Which is NOT one of the types of current used in Arc welding?

ACDC

Screen off the welding arc with a welding curtain that will _______ the welding light.

Absorb

Which of the research sources is associated with the following characteristic? "The most up-to-date information written by researchers"

Academic Research

Which gas is flammable in the Oxyacetylene system?

Acetylene

All except one of the these metals may give off dangerous fumes and always require forced ventilation when being welded. Which metal is the exception?

Aluminum

Weaving of the welding electrode can control all the following characteristics of the weld bead except.

Arc blow

When uneven flux lines cause the arc between the electrode and the work to move during welding is referred to as ...

Arc waves

Which comes first in the casting operation A or B? A. Make the Gates B. Put in parting powder

B

Which is NOT an advantages of using the backhand welding technique?

Bead visibility, Travel Speed, Depth of Fusion

What is the most commonly used metal

Carbon Steel

These lines show a curved or circular surface

Center

Which of the following is NOT a Disadvantages to casting?

Ceramics cannot be cast under any circumstances

Why is acetylene the most popular fuel gas used for oxyfuel welding?

Concentrated flame.

What kind of coating is on some wire electrodes, who's purpose is to provide some protection to the electrode from rusting and improves the electrical contact between the wire electrode and the contact tube.

Copper

Which of the following is NOT one of the five steps that might be followed to fabricate a project.

Designing

_____________ are used to show small details of an area on a part without having to draw the entire part larger.

Detail View

Tools that have an extra layer of electrical insulation that eliminates the need for a three-prong and grounded outlet are referred to as...

Double Insulated

_____________ scales are divided into decimals of inches.

Engineers

What type of eye and face protection should be worn for heavy grinding?

Face Shield and Safety Glasses

Which of the following is NOT some of the PPE required to ARC weld safely.

Face shield

A 60% duty cycle means that out of every ten minutes, the machine can be used for six minutes at the Medium rated current.

False

An alternator can produce AC or DC power.

False

As the electrode extension is Decreased, there is a reduction in weld heat,penetration, and fusion, and an increase in buildup.

False

If you hold the torch closer to the metal, the weld will become smaller. As you raise it up, the weld will become wider.

False

What are the 2 factors that you should adjust on the MIG welder?

Feed rate and heat

_______________means that there is a reasonable expectation that the weld will never fail as long as the weldment is used as it was designed to be used.

Fit for Service

What is the name when the flame burns back inside the tip, torch, hose, or regulator?

Flashback

Which three views are usually provided on a mechanical drawing?

Front, top, Right side

Shielding ______________are used to protect the molten weld metal from atmospheric contamination.

Gases

What is NOT an advantage to Casting objects

Has low energy cost

What is the name of this line __ __ __ __ __ __ __ __

Hidden

What is used to reduce the high cylinder or system pressure to the proper lower working pressure?

Hoses

All cutting processes except shearing remove some metal, leaving a small gap or space. This gap or space is called the "_________".

Kerf

What is the name of joints made by overlapping the edges of two plates

Lap

When welding your capes, jackets, aprons, sleeves, gloves, caps, pants, knee pads, and spats should be made from this material.

Leather

Which is NOT an advantage to SMA Welding?

Less Pollution

What is another term that gas metal arc welding is referred to as?

MIG

What is the easiest metal to gas weld?

Mild steel

Metals having higher values of coefficients of expansion tend to distort _________ than those with lower values.

More

Which of the research sources is associated with the following characteristic? " Is usually written by a Journalist"

Newspaper

What is the name of the line that is heavy, dark and shows solid surfaces

Object

_______ may occur if the electrode is stored in a damp location

Oxidation, rust, corrosion

What is produced by the ultraviolet radiation in the air in the vicinity of arc welding and cutting operations.

Ozone

Which of the following is NOT one of the three types of clamps used to temporarily hold parts in place so that they can be tack welded.

Pipe Clamp

Which is NOT one of the three units used to describe any electrical current?

Resistance

Which of the following is NOT a factors that should be considered when selecting a welding process.

Skill level of the Welder

Which of the following is NOT one of the four advantages for using preformed parts in a fabrication?

Strength

What is one way to solve excessive arc blow?

Switching from DC to AC

These are a temporary method of holding parts in place until they can be completely Welded.

Tack weld

Why is it important to wear safety glasses when looking at the surface of a cooling weld bead?

The glass-like substance can pop off the weld bead as it cools.

What does the 60 stand for in a 6011 electrode number?

The weld can hold 60,000 lbs.

How does the tensile strength of a metal affect a weld?

The weld might not be as strong as it is designed to be

A part's _________ is the amount that a part can be bigger or smaller than it should be and still be acceptable.

Tolerance

Which of the research sources is associated with the following characteristic? "Is usually written by someone in the field"

Trade Journal

A lack of uniform width might indicate you were not using a consistent weave pattern.

True

Alternators can be smaller in size and lighter in weight than generators and still produce the same amount of power.

True

An oxyacetylene welding tip may overheat if the flame is turned down below the minimum for that particular tip size.

True

Hoses used in welding are resistant to burns, but they are not burn proof.

True

In DCEN the work piece is positively charged.

True

On most code welding jobs, an arc strike outside of the weld zone may be considered a defect.

True

The forehand technique is sometimes referred to as pushing the weld bead, and backhand may be referred to as pulling, or dragging the weld bead.

True

The terms amperage, amps, and current can all be interchanged when referring to electrical flow.

True

What type of Fire Extinguisher is used on ordinary materials such as wood or plastic

Type A

What type of Fire Extinguisher is used on Combustible Liquids such as Oil

Type B

What type of Fire Extinguisher is used on electrical fires

Type C

What type of Fire Extinguisher is used on metal fires such as Zinc

Type D

Besides infrared what is the other type of light that can cause burns?

Ultraviolet

Which of the following terms do not refer to the relation of the gun to the worksurface.

Welder Angle

A ____________ is an assembly whose component parts are joined by welding.

Weldment

What are the most common and painful injuries that occur in welding fabrication?

burns

How do they ensure that regulators cannot be connected to the wrong gas or pressure?

different design fittings

In the AC mode the current changes direction each ...

every 1/120 of a second

What burns are reddish in color, tender, and painful and do not involve any broken skin?

first degree

Which is NOT an advantage of GMA welding over conventional electrode type arc welding?

greater heat range

The diameter of the hole in the torch tip determines its...

heating capacity

You should NOT put __________ on a burn?

ice water

If your electrode continues to stick to the metal you should ____ first.

increase amps

Which of these is NOT an advantage to gas welding?

instantaneous (very fast)

Why is it unsafe to use oil on a regulator?

it can cause an explosion

Which is NOT an advantages of transformer type welding machines?

less expensive

How often must should welding cables be checked?

periodically

What do the regulators measure?

pressure in the tank/hose

What is the purpose of the shielding gas during the GMA welding process?

protects the weld from the atmosphere

Doing this might cause cracks, and make the welds brittle.

quenching it in water

One factor that affects the degree to which a metal will distort and possibly remain distorted is?

rate of thermal expansion

What should you do if the electrode gets stuck to the metal?

release your electrode from the holder

How long might it take to burn your eyes with UV light?

seconds

If your weld has excessive splatter and a dusty burnt color you may have the welder set..

too many volts

Watch the shape of the trailing edge of the molten weld pool, if the ripples are pointed, the weld is cooling too slowly because Of...

too much heat

How is the amperage adjusted on a GMA welder?

wire feed speed